AU2016434707B2 - Direct current circuit breaker - Google Patents
Direct current circuit breaker Download PDFInfo
- Publication number
- AU2016434707B2 AU2016434707B2 AU2016434707A AU2016434707A AU2016434707B2 AU 2016434707 B2 AU2016434707 B2 AU 2016434707B2 AU 2016434707 A AU2016434707 A AU 2016434707A AU 2016434707 A AU2016434707 A AU 2016434707A AU 2016434707 B2 AU2016434707 B2 AU 2016434707B2
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- Australia
- Prior art keywords
- arc
- extinguishing chamber
- breaker
- wheels
- contact
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/36—Metal parts
- H01H9/362—Mounting of plates in arc chamber
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/346—Details concerning the arc formation chamber
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
[Problem] To provide a mechanism for moving an arc-extinguishing chamber of a direct current circuit breaker wherein the maintenance and inspection of contacts can be performed readily, and safely in a short-time. [Solution] The invention comprises an arc-extinguishing chamber sliding movement mechanism 17 allowing an arc-extinguishing chamber 2 to be moved between two positions which are: an operating position wherein the arc-extinguishing chamber 2 is disposed in an area above a fixed-side main contact 5 and a mobile-side main contact 7; and an inspection position wherein the arc-extinguishing chamber 2 has been moved horizontally from the operating position, causing the area above the fixed-side main contact 5 and the mobile-side main contact 7 to be in an open state.
Description
Technical Field
[0001]
The present invention relates to a DC breaker, and particularly relates to an
arc-extinguishing chamber shifting mechanism which is suitable for a DC high
speed breaker.
Background Art
[0002]
As a protection breaker which is used for an electric railroad substation,
there is a DC high-speed breaker which is indicated, for example, in Patent
Document 1. A main contact, by which a main circuit electric current is passed,
and an are contact, by which the main contact is protected, are provided at
contact portions of a DC high-speed breaker of this kind. The are contact is
opened and separated at a timing, which is later than a timing of the main
contact, when an electric current is interrupted, whereby an are is certainly
generated at the are contact, and it is prevented that the main contact is melted
and broken by an are, and it is prevented that an energization capability is
lowered when the main contact is melted and broken.
Therefore, damage is caused by the are at the are contact, so that
maintenance and an inspection of the are contact are required after an electric
current is interrupted at many times or after a large electric current is
interrupted, and there is a required case in which the are contact is replaced.
When the are contact is maintained and inspected, it is required that an arc- extinguishing chamber, which covers a circumference of the contact portions, is detached from a main body of a DC breaker, or it is required that the arc extinguishing chamber is shifted to a position at which the are contact can be replaced.
Moreover, an are, which is caused when an electric current is interrupted, is
set at a very high temperature, so that a surrounding structure is melted and
broken, and a metal powder or soot of carbide is caused. When the metal
powder or the carbide adheres to a main contact, a contact resistance at an
adhering portion is increased, and there is a possibility in which an accident of an
energization fault is caused, so that, in order to prevent the energization fault,
when a maintenance and an inspection is performed, it is required that a main
circuit portion is exposed, and a condition of a main contact portion is confirmed,
and when a maintenance is required, an operation, by which the adhering portion
is removed, is required.
In a conventional art, for example, in a DC breaker which is indicated in
Patent Document 2, in order to expose a contact portion when the DC breaker is
inspected, an attaching clamp, by which a hinge bar is attached to an arc
extinguishing portion, is provided, and a U-shaped clamp is attached to a frame
of the DC breaker so as to be linked to the hinge bar, whereby the U-shaped
clamp and the hinge bar are formed as a hinge mechanism by which the arc
extinguishing portion is formed as a single swinging arc-extinguishing portion in
a state where the hinge bar is used as a center of a rotation, so that the DC
breaker is configured in such a way that the contact portion is exposed when the
DC breaker is inspected.
Conventional Art Document
Patent Document
[0003]
Patent Document 1: Japanese Utility Model Publication No. H06-60944
Patent Document 2: Japanese Laid-Open Patent Publication No. H07-153350
Problems to be solved by the Invention
[0004]
As described above, in order to maintain and inspect a contact portion, it is
required that the contact portion is exposed, so that there are two kinds of
methods by which an arc-extinguishing chamber is detached from a main body of
a DC breaker, or the arc-extinguishing chamber is shifted.
Because the arc-extinguishing chamber is formed as a heavy object, it is
dangerous that the arc-extinguishing chamber is lifted and detached by one
person, so that, in order to detach the arc-extinguishing chamber from the main
body of the DC breaker, it is required that a special hanging tool is prepared and
a hanging device, such as a crane, is prepared, therefore, there have been
problems in that a workability is worsened, and a maintenance and an inspection
for the DC breaker depend on an environment of a facility. Moreover, it is
required that a fastening component, by which the arc-extinguishing chamber
and the main body of the DC breaker are fastened, is detached, so that there has
been a problem in that many times are expended for a working operation.
[0005]
In a method by which an arc-extinguishing chamber is shifted, there is a hinge mechanism for which a rotational movement is used as a conventional art.
The hinge mechanism has an advantage in which the hinge mechanism can be
configured by using a simple configuration, and the hinge mechanism has an
advantage in which an operation force is reduced in accordance with a moment
ratio and the arc-extinguishing chamber can be shifted by using a relatively
lower operation force when the arc-extinguishing chamber is rotated (shifted),
and a few time is required in order to expose a contact. On the other hand,
there has been a problem in which if a hand is separated from the arc
extinguishing chamber before the arc-extinguishing chamber is shifted to a static
position in accordance with, for example, a factor in which a hand is slid when
the arc-extinguishing chamber is rotated and operated, the arc-extinguishing
chamber is vigorously dropped off with a rotational movement, and the arc
extinguishing chamber is broken by an impact which is caused when the arc
extinguishing chamber is dropped off. Moreover, if a person is stayed in a
dropping off area of the arc-extinguishing chamber, there is a possibility in which
the arc-extinguishing chamber is touched to a body, such as a hand or a head,
and a bodily injury is caused, so that it has been required that the arc
extinguishing chamber is very carefully shifted.
[0005A]
A DC breaker provided in accordance with the present invention includes a
contact at a fixed side, and a contact at a movable side. The contact at the
movable side is driven by an operation mechanism and is separated from the
contact at a fixed side. An arc-extinguishing chamber is arranged at an upper
portion of the contact at a fixed side and the contact at a movable side. There is
provided an arc-extinguishing chamber shifting mechanisms, by which the arc- extinguishing chamber can be shifted between two positions which are composed of an operation position, which is arranged at an upper portion of the contact at a fixed side and the contact at a movable side, and an inspection position at which the arc-extinguishing chamber is shifted in a horizontal direction from the operation position, and an upper portion of the contact at a fixed side and the contact at a movable side is set as an open state.
[0006]
The present invention has been made to solve, or to ameliorate, at least in
part, the above-described problems. Embodiments of the invention helps to
provide a contact portion is easily and safely maintained and inspected in a short
time at arc-extinguishing chamber shifting mechanisms of a DC breaker.
Means for solving problems
[0007]
In a DC breaker of the present invention, arc-extinguishing chamber shifting
mechanisms, by which the arc-extinguishing chamber can be shifted between two
positions which are composed of an operation position, which is arranged at an
upper portion of the contact at a fixed side and the contact at a movable side, and
an inspection position at which the arc-extinguishing chamber is shifted in a
horizontal direction from the operation position, and an upper portion of the
contact at a fixed side and the contact at a movable side is set as an open state,
are provided.
Effects of the Invention
[0008]
According to the present invention, arc-extinguishing chamber shifting
mechanisms, by which an arc-extinguishing chamber can be shifted from an
operation position to an inspection position at which an upper portion of a contact
at a fixed side and a contact at a movable side is set as an open state, whereby a
DC breaker, in which contact portions can be easily maintained and inspected in
a short time, can be obtained.
[0009]
Fig. 1 is a side view which indicates an overall configuration, in a closed
contact state, for explaining a configuration of a DC high-speed breaker which is
formed as a DC breaker according to Embodiment 1 of the present invention;
Fig. 2 is a side view which indicates a state in which a contact, of the DC high
speed breaker which is formed as the DC breaker according to Embodiment 1 of
the present invention, is opening and separating;
Fig. 3 is a side view which indicates a state before an arc-extinguishing
chamber, of the DC high-speed breaker which is formed as the DC breaker
according to Embodiment 1 of the present invention, is shifted;
Fig. 4 is a side view which indicates a state after the arc-extinguishing
chamber, of the DC high-speed breaker which is formed as the DC breaker
according to Embodiment 1 of the present invention, is shifted;
Fig. 5 is a side view which indicates the arc-extinguishing chamber and
portions of shifting mechanisms in the DC high-speed breaker which is formed as
the DC breaker according to Embodiment 1 of the present invention;
Fig. 6 is a side view which indicates a main portion of the arc-extinguishing chamber in the DC high-speed breaker which is formed as the DC breaker according to Embodiment 1 of the present invention;
Fig. 7 is an oblique perspective view for explaining a configuration of the arc
extinguishing chamber and the shifting mechanisms in the DC high-speed
breaker which is formed as the DC breaker according to Embodiment 1 of the
present invention;
Fig. 8 is a disassembled oblique perspective view for explaining an attachment
configuration of the arc-extinguishing chamber and the shifting mechanisms in
the DC high-speed breaker which is formed as the DC breaker according to
Embodiment 1 of the present invention;
Fig. 9 is a disassembled oblique perspective view for explaining a
configuration of the shifting mechanism at a front side of the DC breaker in the
DC high-speed breaker which is formed as the DC breaker according to
Embodiment 1 of the present invention;
Fig. 10 is a disassembled oblique perspective view for explaining a
configuration of the shifting mechanism at a rear side of the DC breaker in the
DC high-speed breaker which is formed as the DC breaker according to
Embodiment 1 of the present invention;
Fig. 11 is a cross-sectional view for explaining a configuration of a shifting
mechanism a DC high-speed breaker which is formed as a DC breaker according
to Embodiment 2 of the present invention, in a state where the shifting
mechanism is viewed from a front of the DC breaker;
Fig. 12 is a side view for explaining an operation of a shifting mechanism, at a
front side of a DC breaker, in a DC high-speed breaker which is formed as the DC
breaker according to Embodiment 3 of the present invention;
Fig. 13 is a side view for explaining an operation of the shifting mechanism, at
the front side of the DC breaker, in the DC high-speed breaker which is formed
as the DC breaker according to Embodiment 3 of the present invention;
Fig. 14 is a side view for explaining an operation of the shifting mechanism, at
the front side of the DC breaker, in the DC high-speed breaker which is formed
as the DC breaker according to Embodiment 3 of the present invention;
Fig. 15 is a cross-sectional view for explaining the other form of a shifting
mechanism in a DC high-speed breaker which is formed as a DC breaker
according to Embodiment 4 of the present invention;
Fig. 16 is a cross-sectional view for explaining the other form of a shifting
mechanism in a DC high-speed breaker which is formed as a DC breaker
according to Embodiment 5 of the present invention;
Fig. 17 is a view for explaining a configuration of a fixing clamp of a shifting
mechanism in a DC high-speed breaker which is formed as a DC breaker
according to Embodiment 6 of the present invention; and
Fig. 18 is a view for explaining a configuration of the fixing clamp of the
shifting mechanism in the DC high-speed breaker which is formed as the DC
breaker according to Embodiment 6 of the present invention.
[0010]
Hereinafter, embodiments of the present invention will be described in
reference to the drawings. In addition, reference symbols, which are the same
as those in each of the drawings, refer to the same or equivalent parts.
[0011] Embodiment 1 Fig. 1 is a side view, at a time when an electric current is passed, for
explaining a configuration of a DC high-speed breaker which is formed as a DC
breaker according to Embodiment 1 of the present invention, and Fig. 2 is a side
view, at a time when an electric current is interrupted, for explaining a
configuration of an arc-extinguishing chamber of the DC high-speed breaker.
Firstly, a configuration of the DC high-speed breaker will be explained in
reference to Fig. 1.
A DC high-speed breaker 1 (in the following descriptions, the DC high-speed
breaker 1 is referred to as a breaker) includes an upper portion conductor 3
which is arranged at a lower portion of an arc-extinguishing chamber 2, a lower
portion conductor 4 which is arranged at a lower side of the upper portion
conductor 3, a main contact 5 at a fixed side, which is connected to the upper
portion conductor 3, and a main contact 7 at a movable side, which is mounted at
an end portion of a movable element 6 which is connected to the lower portion
conductor 4 via a flexible conductor 32, in a state where the movable element 6
can be relatively moved.
The main contact 7 at a movable side is rotated and driven in a direction of
the main contact 5 at a fixed side by an operation mechanism 31, in a state where
a rotary shaft 10 is used as a fulcrum, whereby the main contact 7 is contacted to
the main contact 5 at a fixed side, and an energized circuit is set as a connection
state.
In the connection state, an electric current is passed through a passage of the
upper portion conductor 3, the main contact 5 at a fixed side, the main contact 7
at a movable side, the movable element 6, and the lower portion conductor 4.
When an electric current is interrupted, if a fault electric current is flowed,
an overcurrent detector 8, which is arranged at the lower portion conductor 4,
detects an overcurrent, and the overcurrent detector 8 is operated, and alatch 9,
by which the movable element 6 is maintained when an electric current is
passed, is released, whereby the movable element 6 is rotated in a state where
the rotary shaft 10 is centered, and an opening-pole operation is performed. The
main contact 5 at a fixed side and the main contact 7 at a movable side are
installed in an inner portion of the arc-extinguishing chamber 2, and are
contacts, at which an are is generated when an electric current is interrupted, are
arranged at an upper portion of a main contact portion, and the are contacts are
composed of an are contact 11 at a fixed side and an are contact 12 at a movable
side.
When the opening-pole operation is performed, the are contact11 and the are
contact 12 are opened and separated at a late time after the main contacts are
opened and separated, whereby an are Ar is generated as indicated in Fig. 2, and
the arccontact1land the arccontact 12 prevent that an arcis generated at the
main contacts and the main contacts are melted and broken, and the are
contact11 and the are contact 12 protect the main contact from an are. Arcing
horns, by which a generated are is transferred and flowed so as to be guided to an
upper portion of the arc-extinguishing chamber 2, are arranged at upper portions
of the are contact11 and the are contact 12, and the arcing horns are composed of
an arcing horn 13 at a fixed side and an arcing horn 14 at a movable side. Grids
having a magnetic characteristic, which are composed of magnetic objects
having a thin plate shape, by which an are voltage is enhanced and a limited
electric current is interrupted in accordance with a dropped-off voltage of an electrode and an extension of an are length, are arranged at an upper side of the arc-extinguishing chamber 2, and an are is guided to an aggregate of the grids 15, whereby the are is interrupted.
[0012]
Fig. 3 is a schematic side view for explaining an operation of arc
extinguishing chamber slide shifting mechanisms which are used as arc
extinguishing chamber shifting mechanisms in the DC breaker according to the
present invention, and Fig. 3 indicates a state before the arc-extinguishing
chamber 2 is slid and sifted. Moreover, Fig. 4 is a schematic side view for
explaining an operation of the arc-extinguishing chamber slide shifting
mechanisms according to the present invention, and Fig. 4 indicates a state after
the arc-extinguishing chamber 2 is slid and shifted. In Fig. 3 and Fig. 4, a right
side of each of Fig. 3 and Fig. 4 is a front side of the DC breaker, a left side of
each of Fig. 3 and Fig. 4 is a rear side of the DC breaker. Moreover, an arrow in
Fig. 4 represents a shift direction of the arc-extinguishing chamber 2.
Fig. 5 is a side view which indicates the arc-extinguishing chamber 2 and
portions of the arc-extinguishing chamber slide shifting mechanisms in the DC
breaker according to Embodiment 1. Moreover, Fig. 6 is a side view which
indicates a main portion of the arc-extinguishing chamber 2 in the DC breaker
according to Embodiment 1.
Fig. 7 is an oblique perspective view for explaining the arc-extinguishing
chamber slide shifting mechanisms and the arc-extinguishing chamber 2 in the
DC breaker according to the present invention, and Fig. 8 is a disassembled
oblique perspective view for explaining an attachment configuration of the arc
extinguishing chamber 2 and the arc-extinguishing chamber slide shifting mechanisms, and Fig. 9 is a disassembled oblique perspective view for explaining a configuration of the arc-extinguishing chamber slide shifting mechanism at a front side of the DC breaker, and Fig. 10 is a disassembled oblique perspective view for explaining a configuration of the arc-extinguishing chamber slide shifting mechanism at a rear side of the DC breaker.
Hereinafter, a configuration and an operation of the arc-extinguishing
chamber slide shifting mechanisms.
[0013]
An arc-extinguishing chamber slide shifting mechanism 17, for which special
handles 16 for a shift operation are provided, is attached, to the arc
extinguishing chamber 2, at a front side of the DC breaker for the arc
extinguishing chamber 2, and an arc-extinguishing chamber slide shifting
mechanism 18 is attached, to the arc-extinguishing chamber 2, at a rear side of
the DC breaker. When the DC breaker is operated, contact portions are covered,
by the arc-extinguishing chamber 2, as indicated in a state in Fig. 3, and the DC
breaker has a configuration in which the contact portions are not exposed. On
the other hand, when the contact portions are maintained and inspected, in the
DC breaker according to Embodiment 1, if the special handles 16 for a shift
operation are pulled, as indicated in Fig. 4, toward a front side of the DC breaker,
wheels 19 and 20, which respectively have a round bar shape, of the arc
extinguishing chamber slide shifting mechanisms at the both sides are shifted on
rails 21 and 22, which respectively have a long hole shape, while the wheels 19
and 20 are guided in a horizontal direction, and the arc-extinguishing chamber 2,
which is attached to the arc-extinguishing chamber slide shifting mechanisms, is
concurrently slid and shifted, whereby the contact portions are exposed, and the contact portions can be maintained and inspected.
[0014]
Fig. 7 is an oblique perspective view for explaining a configuration after the
arc-extinguishing chamber 2, and the arc-extinguishing chamber slide shifting
mechanisms 17 and 18 are assembled, and Fig. 8 is a disassembled oblique
perspective view for explaining an attachment configuration of the arc
extinguishing chamber 2, and the arc-extinguishing chamber slide shifting
mechanisms 17 and 18. The arc-extinguishing chamber 2, and the arc
extinguishing chamber slide shifting mechanisms 17 and 18 are respectively
configured as a unit, and the arc-extinguishing chamber 2, and the arc
extinguishing chamber slide shifting mechanisms 17 and 18 are linked by
fastening components, such as bolts or screws, from components in a state which
is indicated in Fig. 8, whereby the arc-extinguishing chamber 2, and the arc
extinguishing chamber slide shifting mechanisms 17 and 18 are assembled as
indicated in Fig. 7.
[0015]
Fig. 9 is a disassembled oblique perspective view for explaining a
configuration of the arc-extinguishing chamber slide shifting mechanism 17 at a
front side of the DC breaker. In the arc-extinguishing chamber slide shifting
mechanism 17, an arc-extinguishing chamber attaching clamp 23, which is linked
to the arc-extinguishing chamber 2, and a fixing clamp 24, at which the rail 21
having a long hole shape is provided, are linked by using the wheel 19 which is
composed of a pin. Moreover, the special handles 16 for a shift operation engage
a grip 25 and joints 26, and the joints 26 are linked in a state where the wheel 19
is used as a rotational shaft. Moreover, in order to prevent an error shift operation when the DC breaker is operated, a lock pin 27 for fixing is provided at the joints 26, and notches 28 are provided at the fixing clamp 24 in such a way that the notches 28 are engaged to the lock pin 27.
[0016]
Fig. 10 is a disassembled oblique perspective view for explaining a
configuration of the arc-extinguishing chamber slide shifting mechanism 18 at a
rear side of the DC breaker.
In the arc-extinguishing chamber slide shifting mechanism 18, an arc
extinguishing chamber attaching clamp 29, which is linked to the arc
extinguishing chamber 2, and a fixing clamp 30, at which the rail 22 having a
long hole shape is provided, are linked by using the wheel 20 which is composed
of a pin.
[0017]
As described above, in the DC breaker according to Embodiment 1 of the
present invention, the rails 21 and 22, which respectively have a long hole shape,
and the arc-extinguishing chamber slide shifting mechanisms 17 and 18, which
are composed of the wheels 19 and 20, which are shifted on the rail 21 and the
rail 22, are attached to the arc-extinguishing chamber 2, whereby a device, such
as a tool or a crane, is not required, and the arc-extinguishing chamber 2 can be
easily shifted in a short time, and the DC breaker can be maintained and
inspected in a state where the contact portions are exposed.
[0018]
A DC breaker, according to Embodiment 1, includes a contact 5 at a fixed
side; a contact 7 at a movable side, which is driven by an operation mechanism 31
and is separated from the contact 5 at a fixed side; and an arc-extinguishing chamber 2 which is arranged at an upper portion of the contact 5 at a fixed side and the contact 7 at a movable side; wherein arc-extinguishing chamber shifting mechanisms 17 and 18, by which the arc-extinguishing chamber 2 can be shifted between two positions which are composed of an operation position, which is arranged at an upper portion of the contact 5 at a fixed side and the contact 7 at a movable side, and an inspection position at which the arc-extinguishing chamber 2 is shifted in a horizontal direction from the operation position, and an upper portion of the contact 5 at a fixed side and the contact 7 at a movable side is set as an open state, are provided.
Moreover, the arc-extinguishing chamber shifting mechanisms 17 and 18, in
the DC breaker, according to Embodiment 1, include the wheels 19 and 20 which
are provided at both sides of the arc-extinguishing chamber 2, and rails 21 and
22, which are provided at both sides of a main body of the DC breaker which
includes the operation mechanism 31, for guiding shift operations of the rails 21
and 22.
[0019] Embodiment 2 Fig. 11 is a cross-sectional view which indicates a configuration of an arc
extinguishing chamber slide shifting mechanism in a DC breaker according to
Embodiment 2 of the present invention, in a state where the arc-extinguishing
chamber slide shifting mechanism is viewed from a front of the DC breaker.
Configurations of the other portions in the DC breaker according to Embodiment
2 are identical to configurations of the other portions in the DC breaker according
to Embodiment 1.
Fig. 11 is a cross-sectional view for explaining a configuration by which a shift operation is limited, in a direction except for a shift direction, by a guide in order to prevent that an arc-extinguishing chamber 2 is vibrated when the arc extinguishing chamber 2 is shifted, or the arc-extinguishing chamber 2 is dropped off when an earthquake is caused. In order to prevent that the arc extinguishing chamber 2 is dropped off, in arc-extinguishing chamber slide shifting mechanisms 17 and 18, a width of an arc-extinguishing chamber attaching clamp 23 is wider than a width of a fixing clamp 24, and the arc extinguishing chamber 2 is engaged, whereby it is limited that the arc extinguishing chamber 2 is shifted in a lateral direction which is indicated by an arrow Aa and an arrow Ab which are viewed from a front direction of the DC breaker. Moreover, the arc-extinguishing chamber attaching clamp 23 and the fixing clamp 24 are linked in such a way that a wheel 19 having a round bar shape is passed through each of holes of the arc-extinguishing chamber attaching clamp 23 and the fixing clamp 24, so that it is limited that the arc-extinguishing chamber 2 is shifted in an upper-lower direction which is indicated by an arrow
Ba and by an arrow Bb. As described above, it is limited, in accordance with
configurations of the arc-extinguishing chamber attaching clamp 23, the fixing
clamp 24, and the wheel 19, that the arc-extinguishing chamber 2 is moved in a
direction except for a slide shift direction of the arc-extinguishing chamber 2, so
that it can be prevented that the arc-extinguishing chamber 2 is dropped off, and
safety of the arc-extinguishing chamber 2 can be obtained.
[0020]
In the arc-extinguishing chamber slide shifting mechanisms 17 and 18 in the
DC breaker according to Embodiment 2, blocking components, which block that
the wheels 19 and 20 are shifted in a direction except for a direction in which the arc-extinguishing chamber 2 is shifted, are provided at the wheels 19 and 20 and rails 21 and 22.
[0021] Embodiment 3 Fig. 12 through Fig. 14 are side views which indicate a configuration and
operations of an arc-extinguishing chamber slide shifting mechanism in a DC
breaker according to Embodiment 3 of the present invention. Fig. 12 indicates a
state in which an arc-extinguishing chamber is locked when the DC breaker is
operated, and Fig. 13 indicates a state in which a lock of the arc-extinguishing
chamber is released when the DC breaker is maintained and inspected, and Fig.
14 indicates a state after the arc-extinguishing chamber is shifted when the DC
breaker is maintained and inspected. Configurations of the other portions in the
DC breaker according to Embodiment 3 are identical to configurations of the
other portions in the DC breaker according to Embodiment 1.
Fig. 12 is a side view for explaining a configuration and an operation by
which an arc-extinguishing chamber 2 is fixed and an error shift operation, which
is not intended, is prevented when the DC breaker is operated, in a state where a
lock pin 27 is provided at special handles 16 for a shift operation. At an arc
extinguishing chamber slide shifting mechanism 17 in a front direction of the DC
breaker, the lock pin 27, which is used when the DC breaker is operated, is
provided at the special handles 16 for a shift operation, and the lock pin 27 is
engaged to notches 28 which are provided at a fixing clamp 24, whereby the lock
pin 27 interferes with the notches 28 even if the arc-extinguishing chamber 2
tries to slide and shift, so that the arc-extinguishing chamber 2 cannot be shifted,
and a shift operation of the arc-extinguishing chamber 2 is locked. In a case in which a lock is released in order to shift the arc-extinguishing chamber 2, the special handles 16 for a shift operation are elevated in alockreleasedirection(a counterclockwise direction) of an arrow C which is indicted in Fig. 13, and the special handles 16 for a shift operation are pulled in a slide shift direction of an arrow D which is indicted in Fig. 14, in a state where the special handles 16 for a shift operation are elevated, whereby the arc-extinguishing chamber 2 can be slid and shifted.
As described above, in the DC breaker according to Embodiment 3 of the
present invention, an error shift operation, which is not intended, of the arc
extinguishing chamber 2 is prevented when the DC breaker is operated, and a
tool is not used and a fastening component is not detached when the arc
extinguishing chamber 2 is slid and shifted, and the arc-extinguishing chamber 2
can be easily slid and shifted.
[0022]
The arc-extinguishing chamber slide shifting mechanisms 17 and 18, in the
DC breaker according to Embodiment 3, include the handles 16 for a shift
operation, by which wheels 19 and 20 are operated in a shift direction of the arc
extinguishing chamber 2, and locking means (components), which are provided at
the handles 16 for a shift operation, by which shift operations to an open state,
which are caused in accordance with shift operations of the wheels 19 and 20, are
blocked or released.
[0023] Embodiment 4 Fig. 15 is a cross-sectional view which indicates a configuration of an arc
extinguishing chamber slide shifting mechanism in a DC breaker according to
Embodiment 4 of the present invention, in a state where the arc-extinguishing
chamber slide shifting mechanism is viewed from a front of the DC breaker.
Configurations of the other portions in the DC breaker according to Embodiment
4 are identical to configurations of the other portions in the DC breaker according
to Embodiment 1.
Fig. 15 is corresponding to the other form according to Embodiment 1, and
although the wheel 19 is composed of one round bar in Embodiment 1, wheels
190 which are guided by rails, which respectively have a long hole shape and are
provided at an arc-extinguishing chamber attaching clamp 230 and a fixing
clamp 240, are composed of two round bars, in Embodiment 4, which are used as
left-right different components. Because the DC breaker is configured as
described above, a function, which is similar to a function according to
Embodiment 1, can be obtained, and an amount of a processing for the round
bars can be reduced, and moreover, because the wheels 190 have the same
configuration, the number of manufacture is increased, so that a cost for
configuring the arc-extinguishing chamber slide shifting mechanism can be
reduced.
[0024]
Embodiment 5
Fig. 16 is a cross-sectional view, in which an arc-extinguishing chamber slide
shifting mechanism is viewed from a front of a DC breaker, which indicates a
configuration of the arc-extinguishing chamber slide shifting mechanism in the
DC breaker according to Embodiment 5 of the present invention.
Configurations of the other portions in the DC breaker according to Embodiment are identical to configurations of the other portions in the DC breaker according to Embodiment 1.
Fig. 16 is corresponding to the other form according to Embodiment 1, and
although the arc-extinguishing chamber slide shifting mechanisms are composed
of the wheels and the rails which respectively have a long hole shape, in order to
slide and shift the arc-extinguishing chamber in the DC breaker according to
Embodiment 1, an outer circumference portion 231a of an arc-extinguishing
chamber attaching clamp 231 and an outer circumference portion 241a of a fixing
clamp 241 respectively has a bent configuration as indicated by dot-and-dash line
circles E, and the arc-extinguishing chamber attaching clamp 231 is slid on the
fixing clamp 241, whereby a function, which is similar to a function according to
Embodiment 1, can be obtained, and a processing for the wheels and the rails is
not required, so that a cost for the wheels and the rails can be reduced.
[0025]
Embodiment 6
Fig. 17 and Fig. 18 are views for explaining a configuration of a fixing clamp
of an arc-extinguishing chamber slide shifting mechanism in a DC breaker
according to Embodiment 6 of the present invention. Configurations of the other
portions in the DC breaker according to Embodiment 6 are identical to
configurations of the other portions in the DC breaker according to Embodiment
1.
In the DC breaker according to Embodiment 6, which is indicated in Fig. 17
and Fig. 18, a configuration of the fixing clamp, by which an error shift operation
of an arc-extinguishing chamber 2, which is caused by a vibration, is suppressed in such a way that shapes of both ends of a long hole portion of a rail, which are static positions of an arc-extinguishing chamber 2, are lowered in a ground direction, will be explained. When a rail is horizontal with respect to a ground, in order to slide and shift the arc-extinguishing chamber 2, it is required that an operation force F 1 is greater than a friction force F3 which is acted in accordance with a force F 2 in a vertical direction, which is acted to the wheels, and a coefficient of friction, which is set in accordance with a state between the wheels and the rails. However, a long hole, which is a rail 500 of a fixing clamp 400, is formed as a long hole 500 having a shape in which both end portions of the long hole 500 are lowered as indicated in Fig. 17 and Fig. 18, whereby, when the arc extinguishing chamber 2 is stayed at static positions Sp, an operation force F4
, which is required for sliding and shifting the arc-extinguishing chamber 2, is set
as a resultant force, in which the friction force F3 and a force "F2 x sin 0", which is
set in accordance with the force F2 and an angle 0, are added. Therefore, it is
required that the operation force F 4 is greater than the force F 2, and a lowered
width Lw for both end portions is varied, whereby the operation force F 4 can be
set.
As described above, in the DC breaker according to Embodiment 6 of the
present invention, the operation force F 4 is set in a range in which an operator
can operate the DC breaker, whereby an operational capability of the arc
extinguishing chamber 2 is not lost, and an involuntary error shift operation,
which is caused in accordance with a vibration, of the arc-extinguishing chamber
2 is inhibited, and safety of the arc-extinguishing chamber 2 can be improved.
[0026]
The rail 500 of the arc-extinguishing chamber slide shifting mechanism in the DC breaker according to Embodiment 6 is formed as the long hole which is extended in a shift direction of the arc-extinguishing chamber 2 so as to be formed at a fixed portion of the arc-extinguishing chamber slide shifting mechanism, and the both end portions of the long hole are bent toward a static position side of the arc-extinguishing chamber 2.
[0027]
In the scope of the present invention, it is possible that each of
embodiments is freely combined, or each of embodiments is suitably modified or
omitted.
[0028]
In the claims which follow and in the preceding description of the invention,
except where the context requires otherwise due to express language or
necessary implication, the word "comprise" or variations such as "comprises" or
"comprising" is used in an inclusive sense, i.e. to specify the presence of the
stated features but not to preclude the presence or addition of further features
in various embodiments of the invention.
[0029]
It is to be understood that, if any prior art publication is referred to herein,
such reference does not constitute an admission that the publication forms a
part of the common general knowledge in the art, in Australia or any other
country.
Description of the Symbols
[0030]
"1" is a DC high-speed breaker; "2," an arc-extinguishing chamber; "5," a main contact at a fixed side; "7," a main contact at a movable side; "16," special handles for a shift operation; "17 and 18," are-extinguishing chamber slide shifting mechanisms; "19 and 20," wheels; "21 and 22," rails; "27," a lock pin;
"28," notches.
Claims (12)
1. A DC breaker comprising:
a contact at a fixed side;
a contact at a movable side, which is driven by an operation mechanism and
is separated from the contact at a fixed side; and
an arc-extinguishing chamber which is arranged at an upper portion of the
contact at a fixed side and the contact at a movable side; wherein
arc-extinguishing chamber shifting mechanisms, by which the arc
extinguishing chamber can be shifted between two positions which are composed
of an operation position, which is arranged at an upper portion of the contact at a
fixed side and the contact at a movable side, and an inspection position at which
the arc-extinguishing chamber is shifted in a horizontal direction from the
operation position, and an upper portion of the contact at a fixed side and the
contact at a movable side is set as an open state, are provided.
2. A DC breaker as recited in claim 1, wherein the arc-extinguishing chamber
shifting mechanisms include wheels which are provided at the arc-extinguishing
chamber, and rails, which are provided at a main body of the DC breaker which
includes the operation mechanism, for guiding shift operations of the rails.
3. A DC breaker as recited in claim 2, wherein blocking components, which
block that the wheels are shifted in a direction except for a direction in which the
arc-extinguishing chamber is shifted, are provided at the wheels and the rails.
4. A DC breaker as recited in claim 2 or claim 3, wherein the arc- extinguishing chamber shifting mechanisms include handles for a shift operation, by which the wheels are operated in a shift direction of the arc-extinguishing chamber, and locking means, which are provided at the handles for a shift operation, by which shift operations to the open state, which are caused in accordance with shift operations of the wheels, are blocked or released.
5. A DC breaker as recited in any one of claims 2 to 4, wherein the rails are
formed as long holes which are extended in a shift direction of the arc
extinguishing chamber so as to be formed at fixed portions of the arc
extinguishing chamber shifting mechanisms, and both end portions of the long
holes are bent toward a static position side of the arc-extinguishing chamber.
6. A DC breaker as recited in any one of claims 2 to 5, wherein,
in the arc-extinguishing chamber shifting mechanisms, arc-extinguishing
chamber attaching clamps, to which the arc-extinguishing chamber is linked, and
fixing clamps, at which the rails are provided, are linked by using the wheels.
7. A DC breaker as recited in claim 1, wherein
the arc-extinguishing chamber shifting mechanisms include wheels and
rails, by which shift operations of the wheels are guided, and the rails are formed
as a pair of long holes, which are respectively parallel in a horizontal direction
and are extended in a sift direction of the arc-extinguishing chamber so as to be
formed at fixed portions of the arc-extinguishing chamber shifting mechanisms,
and the wheels are formed as pins which penetrate through the long holes so as
to be engaged to the long holes in such a way that the wheels can be slid.
8. A DC breaker as recited in claim 7, wherein
both end portions of the long holes of the rails are lowered in a ground
direction.
9. A DC breaker as recited in claim 7, wherein
both end portions of the long holes of the rails are bent toward a static
position side of the arc-extinguishing chamber.
10. A DC breaker as recited in claim 8 or claim 9, wherein,
in a state in which the rails are horizontal with respect to a ground, when a
force, by which the arc-extinguishing chamber is horizontally slid, is defined as
an operation force F1, and a force in a vertical direction, which is acted to the
wheels, is defined as a force F2, and a force, which is acted in accordance with the
force F2 and a coefficient of friction which is set in accordance with a state
between the wheels and the rails, is defined as a friction force F3, and a force,
which is required for sliding and shifting the arc-extinguishing chamber when
the arc-extinguishing chamber is stayed at static positions, is defined as an
operation force F4, and an angle, for which a direction of the operation force F4 is
set as a horizontal direction, is defined as an angle 0, the operation force F4 is set
as a resultant force, in which the friction force F3 and a force "F2D sin0", which
is set in accordance with the force F2 and the angle 0, are added.
11. A DC breaker as recited in any one of claims 7 to 10, wherein
blocking components, which block that the wheels are shifted in a direction
except for a direction in which the arc-extinguishing chamber is shifted, are provided at the wheels and the rails.
12. A DC breaker as recited in any one of claims 7 to 11, wherein
the arc-extinguishing chamber shifting mechanisms include handles for a
shift operation, by which the wheels are operated in a shift direction of the arc
extinguishing chamber, and locking means, which are provided at the handles for
a shift operation, by which shift operations to the open state, which are caused in
accordance with shift operations of the wheels, are blocked or released.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/088642 WO2018122901A1 (en) | 2016-12-26 | 2016-12-26 | Direct current circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2016434707A1 AU2016434707A1 (en) | 2019-05-30 |
| AU2016434707B2 true AU2016434707B2 (en) | 2020-09-17 |
Family
ID=60685683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2016434707A Active AU2016434707B2 (en) | 2016-12-26 | 2016-12-26 | Direct current circuit breaker |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3561841B1 (en) |
| JP (1) | JP6250238B1 (en) |
| AU (1) | AU2016434707B2 (en) |
| WO (1) | WO2018122901A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110379665B (en) * | 2019-06-28 | 2021-06-08 | 江苏省如高高压电器有限公司 | Novel isolation load switch |
| CA3234992A1 (en) * | 2021-12-22 | 2023-06-29 | Powell Electrical Systems, Inc. | Enabling equipment to withstand and control the effects of internal arcing faults |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5449001A (en) * | 1977-08-23 | 1979-04-18 | Siemens Ag | Equipment housing |
| JPH06334381A (en) * | 1993-05-21 | 1994-12-02 | Toppan Printing Co Ltd | Magnetic shielding housing box |
| JPH07153350A (en) * | 1993-12-02 | 1995-06-16 | Fuji Electric Co Ltd | Direct current breaker |
| JP2015204182A (en) * | 2014-04-14 | 2015-11-16 | 三菱電機株式会社 | breaker |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3177325A (en) * | 1960-12-21 | 1965-04-06 | Ite Circuit Breaker Ltd | Mechanical and electrical pivot between removable arc chute and stationary contact structure |
| CA1015012A (en) * | 1974-05-16 | 1977-08-02 | Edward A. Halbach | Interlock for arc chute of circuit maker and breaker |
| JPS5647352Y2 (en) * | 1976-08-25 | 1981-11-05 | ||
| JPH0339064Y2 (en) * | 1986-08-19 | 1991-08-16 | ||
| JPS6481604A (en) * | 1987-09-22 | 1989-03-27 | Toshiba Corp | Line breaker |
| WO2011128379A1 (en) * | 2010-04-16 | 2011-10-20 | Abb Technology Ag | Arc chute for a circuit breaker, circuit breaker and method for assembling an arc chute |
-
2016
- 2016-12-26 JP JP2017526999A patent/JP6250238B1/en active Active
- 2016-12-26 EP EP16925768.0A patent/EP3561841B1/en active Active
- 2016-12-26 WO PCT/JP2016/088642 patent/WO2018122901A1/en active Application Filing
- 2016-12-26 AU AU2016434707A patent/AU2016434707B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5449001A (en) * | 1977-08-23 | 1979-04-18 | Siemens Ag | Equipment housing |
| JPH06334381A (en) * | 1993-05-21 | 1994-12-02 | Toppan Printing Co Ltd | Magnetic shielding housing box |
| JPH07153350A (en) * | 1993-12-02 | 1995-06-16 | Fuji Electric Co Ltd | Direct current breaker |
| JP2015204182A (en) * | 2014-04-14 | 2015-11-16 | 三菱電機株式会社 | breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2018122901A1 (en) | 2018-12-27 |
| EP3561841B1 (en) | 2022-02-23 |
| JP6250238B1 (en) | 2017-12-20 |
| WO2018122901A1 (en) | 2018-07-05 |
| EP3561841A1 (en) | 2019-10-30 |
| AU2016434707A1 (en) | 2019-05-30 |
| EP3561841A4 (en) | 2019-12-04 |
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